Pole-zero plot
Plot the poles and zeros of a model or filter.
## Default S3 method: zplane(filt, a, ...) ## S3 method for class 'Arma' zplane(filt, ...) ## S3 method for class 'Ma' zplane(filt, ...) ## S3 method for class 'Zpg' zplane(filt, ...)
filt |
for the default case, the moving-average coefficients of
an ARMA model or filter. Generically, |
a |
the autoregressive (recursive) coefficients of an ARMA filter. |
... |
Additional arguments passed to |
Poles are marked with an ‘x’, and zeros are marked with an ‘o’.
No value is returned.
Tom Short
Octave Forge http://octave.sf.net
filt <- ellip(5, 0.5, 20, .2) zplane(filt)
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